Getting Fatal error while working

Hello Team,

We are using unity for past four months, for couple of days we are getting fatal error while working and then click ok to close the box the main file got deleted from source. This was happen four more times, can you guys please help us to solve this issue.

System Configuration
Windows 2007
Ram - 4GB
HardDisk - 1 TB
Processor - Intel Core i5 3GHZ
Graphics Card - 1 GB

You might need a new graphics card or a new processor , or you might want to get it checked because that seems to be the problem

your total of file size 200 mb otherwise you will get this error

your total of file size 200 mb otherwise you will get this error